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| author | Venkatesh Pallipadi <venki@google.com> | 2011-04-13 18:21:09 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-04-19 10:08:37 +0200 |
| commit | 69c80f3e9d3c569f8a3cee94ba1a324b5a7fa6b9 (patch) | |
| tree | d802b0ade642dcad187384da9b5312d90e47ea45 /kernel/sched_fair.c | |
| parent | 6ddafdaab3f809b110ada253d2f2d4910ebd3ac5 (diff) | |
| download | linux-stable-69c80f3e9d3c569f8a3cee94ba1a324b5a7fa6b9.tar.gz linux-stable-69c80f3e9d3c569f8a3cee94ba1a324b5a7fa6b9.tar.bz2 linux-stable-69c80f3e9d3c569f8a3cee94ba1a324b5a7fa6b9.zip | |
sched: Make set_*_buddy() work on non-task entities
Make set_*_buddy() work on non-task sched_entity, to facilitate the
use of next_buddy to cache a group entity in cases where one of the
tasks within that entity sleeps or gets preempted.
set_skip_buddy() was incorrectly comparing the policy of task that is
yielding to be not equal to SCHED_IDLE. Yielding should happen even
when task yielding is SCHED_IDLE. This change removes the policy check
on the yielding task.
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1302744070-30079-2-git-send-email-venki@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_fair.c')
| -rw-r--r-- | kernel/sched_fair.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 87445931a179..501ab637b94b 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1846,26 +1846,26 @@ wakeup_preempt_entity(struct sched_entity *curr, struct sched_entity *se) static void set_last_buddy(struct sched_entity *se) { - if (likely(task_of(se)->policy != SCHED_IDLE)) { - for_each_sched_entity(se) - cfs_rq_of(se)->last = se; - } + if (entity_is_task(se) && unlikely(task_of(se)->policy == SCHED_IDLE)) + return; + + for_each_sched_entity(se) + cfs_rq_of(se)->last = se; } static void set_next_buddy(struct sched_entity *se) { - if (likely(task_of(se)->policy != SCHED_IDLE)) { - for_each_sched_entity(se) - cfs_rq_of(se)->next = se; - } + if (entity_is_task(se) && unlikely(task_of(se)->policy == SCHED_IDLE)) + return; + + for_each_sched_entity(se) + cfs_rq_of(se)->next = se; } static void set_skip_buddy(struct sched_entity *se) { - if (likely(task_of(se)->policy != SCHED_IDLE)) { - for_each_sched_entity(se) - cfs_rq_of(se)->skip = se; - } + for_each_sched_entity(se) + cfs_rq_of(se)->skip = se; } /* |